Sounds like the pump is not working. If the spin cycle is operating normally and there is no sound of water being pumped out, it is probably the pump. If so, you need to clean the pump, or fit a new belt.
Either it needs a new belt, or impellor, (the crosshead wheel inside the pump which drives the water) or it needs cleaning. Either way, you'll have to remove the back panel to check. (Unplug the power)
The belt is obvious. pull it slightly to see if the pump drivewheel is turning without too much trouble. ) If it's tight, don't exert any pressure as it's more than likely that it has something in the pump).
If it's OK, remove the outlet and inlet hoses. Use a scrwewdriver on the ring clamps. Then use a crosshead screwdriver to open the pump. (It's a good idea anyway to open and clean the pump if you've gone so far).
If it's the impellor, it should be obvious, in which case you'll have to get a new one. If there is fluff/rubbish in the pump, remove it. Reassemble and check.
Regards
Frank Keenan
Isle of Man
Frank Keenan, April 2006